Autogenous impact mill



FIG. 1 is a perspective view of an autogenous impact mill showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a side view taken from the left of FIG. 1;

FIG. 4 is a side view taken from the right of FIG. 1;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a rear view thereof. 

The ornamental design for an autogenous impact mill, as shown and described. 